Pulsational frequencies in the δ Scuti stars V624 Tauri and HD 23194

Results of the STEPHI X campaign on the Pleiades cluster

¹ Instituto de Astrofísica de Canarias, 38205 La Laguna Tenerife, Spain
² Instituto de Astronomía de la UNAM, Ap.P. 877, Ensenada, BC, Mexico
³ Observatoire de Paris-Meudon, DASGAL, UMR 8633, 92195 Meudon, France
⁴ Beijing Observatory, Chinese Academy of Sciences, Beijing, PR China
⁵ Departamento de Astrofísica, Universidad de La Laguna, Tenerife, Spain
⁶ Observatoire de Paris-Meudon, DAEC, UMR 8632, 92195 Meudon, France
⁷ Observatoire Midi-Pyrénées, 31400 Toulouse, France

Corresponding author: L. Fox-Machado, lfox@ll.iac.es

Received: 12 July 2001
Accepted: 13 November 2001

Abstract

The results of the tenth multi-site campaign of the STEPHI network are reported. The δ Scuti stars V624 Tau (HD 23156) and HD 23194, belonging to the Pleiades cluster, were observed photometrically for 34 days on three continents during 1999 November–December. An overall run of 343 hours of data was collected. Seven frequencies for V624 Tau and two frequencies for HD 23194 have been found above a 99% confidence level. These results greatly improve those found in previous studies with much less data. A preliminary comparison of observed and theoretical frequencies suggests that both stars may oscillate with radial and non-radial p modes of radial orders typical among δ Scuti stars.